diff --git a/src/conf.c b/src/conf.c
index a4f2a4fb..f8b7a668 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -3549,7 +3549,7 @@ int snd_config_hook_load(snd_config_t *root, snd_config_t *config, snd_config_t
 			int n;
 
 #ifndef DOC_HIDDEN
-#ifdef _GNU_SOURCE
+#if defined(_GNU_SOURCE) && !defined(__NetBSD__) && !defined(__FreeBSD__) && !defined(__sun)
 #define SORTFUNC	versionsort
 #else
 #define SORTFUNC	alphasort
diff --git a/src/ucm/parser.c b/src/ucm/parser.c
index 9e1cb41a..8405bd27 100644
--- a/src/ucm/parser.c
+++ b/src/ucm/parser.c
@@ -1264,7 +1264,7 @@ int uc_mgr_scan_master_configs(const char **_list[])
 		"%s", env ? env : ALSA_USE_CASE_DIR);
 	filename[MAX_FILE-1] = '\0';
 
-#ifdef _GNU_SOURCE
+#if defined(_GNU_SOURCE) && !defined(__NetBSD__) && !defined(__FreeBSD__) && !defined(__sun)
 #define SORTFUNC	versionsort
 #else
 #define SORTFUNC	alphasort